Irfandy, Fauzan, Yuli Ristianingsih, and Alit Istiani. “Study of the Activity of Activated Carbon Impregnated With Fe2O3 As a Biosorbent for Methylene Blue from Wastewater”. Eksergi 18, no. 2 (November 1, 2021): 89–92. Accessed August 5, 2025. https://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4536.